Re: scattered_vector.jnl

[Ansley Manke <ansley@xxxxxxxxxxxxx>]

Hi Takaya,
The scattered_vectors script sets Ferret up to do an overlay
plot.  After running it you need to issue a PLOT/OVERLAY
command, which the script coaches you on.  First set up a plot
to overlay upon.  When you run scattered_vectors, Ferret
quotes a command line for you to run, to actually plot the
vectors.  I don't see the error message you are getting, but
these commands work for me:

   yes? go basemap x=90:105 y=-5:15   5   gray
   yes? go scattered_vectors driftconvert.txt 0.1

 LISTing to file vector_commands.jnl
>> PLOT/VS/LINE/D=driftconvert.txt/@aros/OVERLAY arrow_x,arrow_y <<

   yes? PLOT/VS/LINE/D=driftconvert.txt/@aros/OVERLAY arrow_x,arrow_y

Note the @AROS is a region that the script defines for the plot
command.  You could add a "/TITLE=my_title" qualifier to the
PLOT command to put your own title for the vectors into the
vector key.

If you still see the error message, perhaps you could make a
copy of the script scattered_vectors, and replace the "cancel
mode verify" at the start, with a "set mode verify".  Then we will
be able to see what command is failing.

It looks as if this script, and its companion centered_vectors.jnl,
could use some more documentation.  We'll do that.

Ansley Manke


Namba Takaya wrote:

> Dear Sir
>
> I am running ferret5.4 under Linux.
> When I run the script, "scattered_vector.jnl",
> it does not work with the error
>
> **ERROR: command syntax: -
>         - may not start an expression
>
> I guess that I need to modify the "scatterd_vector.jnl".
>
> Could you tell me how I should change it?
>
> my script(current.jnl) is quit simple
>
> !!!!!current.jnl!!!!!!!!
> file /var="lons,lats,uu,vv" driftconvert.txt    !!! 1
> go scattered_vectors driftconvert.txt 0.1
> go fland 5 gray overlay
>
> (driftconvert.txt)
> 95.50, 0.50,-0.03, 0.09
> 96.50, 0.50,-0.06, 0.35
> 97.50, 5.50,-0.16,-0.20
> 99.50, 5.50,-0.07, 0.25
> 100.25, 2.85,-0.15,-0.04
> .
> .
> .
>
> Regards
>
> Takaya Namba
>
> _________________________________________________________________
> $B$-$C$H8+$D$+$k$"$J$?$N?75o(B  $BITF0;:>pJs$O(B MSN $B=;Bp$G(B
> http://house.msn.co.jp/

--
Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA  (206)526-6246